Patents by Inventor Killian D. Efird

Killian D. Efird has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Substituted stannosilicates, their preparation and use as natural gas purification agents (C-2668)
    Patent number: 5264193
    Abstract: Natural gas containing hydrogen sulfide is treated at well-head pressures by contact with a crystalline substituted or unsubstituted stannosilicate for removal of hydrogen sulfide.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: November 23, 1993
    Assignee: Exxon Research and Engineering Company
    Inventors: Edward W. Corcoran, Jr., David E. W. Vaughan, Paul E. Eberly, Jr., Killian D. Efird